Perhaps you should try some spelling variations:
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
nganh khang » nganh khong, ngan hang, nhanh thang
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cach thuc » anh thuc, cac thu
thuoc tai » nuoc tai, hoc tai, thuoc ma
hoc nganh » hoc nhanh
nhan tao » nhan tai, nhan dan
cong hoc » dong hoc, cong hoa, cong coc
thuc tap » tuc tap, thuc thai, thuc vat
tai hoi » tai khoi, dai hoi, tai hai
hoi cau » hoi chu, hoc cau, hoa cau
nhan va » nhan tai, nhan dan, phan van
tu cach » tu cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thuc tap, nghien thu cong hoc nganh khang thuoc tai hoi cau ((nhan va) or (nhan tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thuc tap, nghien thu cong hoc nganh khang thuoc tai hoi cau ((nhan va) OR (nhan tao))*.